landscape concept art of a large alien structure on a wasteland exoplanet, celestial cosmic lovecraftian horror by bruce brenneise and peter mohrbacher and h r giger, ancient ruins in background, large exoplanet in the sky, alien planet with craters and large structures, 3 d render, neosurrealism. digital concept art, pixel art, rendered in octane, trending on cgsociety, trending on artstation 